OCR Gateway GCSE Biology: Combined Science

Topic Questions

3.1 Coordination & Control – the Nervous System

1
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Which definition would be the best description of a stimulus?

  • A detectable change in the internal or external environment of an organism

  • A gap between two neurones

  • A signal which is passed through the nervous system as electrical charge

  • A nerve pathway which triggers an automatic response

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2
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The image below shows a a sensory neurone which forms part of a reflex arc in the nervous system.

14--image-3--neurone-1

An impulse moves along the neurone from Q to P.

What structures would be found at P?

  • An effector

  • A motor neurone

  • A synapse

  • A relay neurone

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3
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A motor neurone is usually stimulated by a relay neurone.

Which part of the motor neurone is first stimulated by a relay neurone?

q10-paper1h-nov2020-ocrgcsebio

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4
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The diagram shows a reflex arc.

q14-paper1h-nov2020-ocrgcsebio

A patient needs treatment for a leg injury.

An anaesthetic is injected to block nerve impulses to prevent pain but still allow movement of the leg.

Where was the anaesthetic injected in this patient?

  • At X

  • At Y

  • At Z

  • At X, Y and Z

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5
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Which label is pointing to the myelin sheath in a sensory neurone?q5-paper1f-june2019-ocrgcsebio

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6
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What is the name of the gap between two neurones?

  • Axon

  • Dendrite

  • Lumen

  • Synapse

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